Pioneer GM-DX874 4-Channel Amplifier vs SLAPZ Mini 5 Car Amplifier

The Pioneer GM-DX874 is the better-built amplifier. It is a 4-channel Class D unit rated at 100 watts RMS per channel, bridgeable, with a wired bass remote and variable LPF/HPF. The SLAPZ Mini 5 is a 5-channel amp: four channels plus a dedicated mono sub channel, in a smaller chassis. Buyers who want one amp to run four speakers and a sub should pick the SLAPZ. Buyers who want clean power, a known brand and a bass knob should pick the Pioneer. Owners of both report the micro 5-channel runs hotter, and the Pioneer's aluminum panel and gold-plated RCAs feel sturdier.

• Choose the Pioneer GM-DX874 if you have four speakers and no sub, or you plan to bridge it to two channels, and you want a proven brand with a wired bass remote.
• Choose the SLAPZ Mini 5 if you need four speakers plus a subwoofer powered from one compact amp and want the smallest footprint.